1 files changed, 123 insertions, 0 deletions
diff --git a/game_server/src/maths.rs b/game_server/src/maths.rs
new file mode 100644
index 0000000..8844c6e
--- /dev/null
+++ b/game_server/src/maths.rs
@@ -0,0 +1,123 @@
+#[derive(Clone, Copy)]
+pub struct Vec2 {
+    pub x: f32,
+    pub y: f32,
+}
+
+impl std::ops::Add for Vec2 {
+    type Output = Self;
+    fn add(self, other: Self) -> Self {
+        Self {
+            x: self.x + other.x,
+            y: self.y + other.y
+        }
+    }
+}
+
+impl std::ops::Sub for Vec2 {
+    type Output = Self;
+    fn sub(self, other: Self) -> Self {
+        Self {
+            x: self.x - other.x,
+            y: self.y - other.y
+        }
+    }
+}
+
+impl std::ops::Neg for Vec2 {
+    type Output = Self;
+    fn neg(self) -> Self {
+        Self {
+            x: -self.x,
+            y: -self.y
+        }
+    }
+}
+
+impl std::cmp::PartialOrd for Vec2 {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(if self.x < other.x && self.y < other.y {
+            std::cmp::Ordering::Less
+        } else if self.x > other.x && self.y > other.y {
+            std::cmp::Ordering::Greater
+        } else {
+            std::cmp::Ordering::Equal
+        })
+    }
+}
+
+impl std::cmp::PartialEq for Vec2 {
+    fn eq(&self, other: &Self) -> bool {
+        f32::abs(self.x - other.x) < 1e-8
+        && f32::abs(self.y - other.y) < 1e-8
+    }
+}
+
+impl std::cmp::Eq for Vec2 {}
+
+impl Vec2 {
+    pub fn distance(&self) -> f32 {
+        f32::sqrt(self.distance2())
+    }
+
+    pub fn distance2(&self) -> f32 {
+        self.x * self.x + self.y * self.y
+    }
+}
+
+pub struct Box {
+    pub pos: Vec2,
+    /// the size may not be smaller than zero
+    pub size: Vec2, 
+}
+
+impl std::ops::Add<Vec2> for Box {
+    type Output = Self;
+    fn add(self, other: Vec2) -> Self {
+        Self {
+            p1: self.p1 + other,
+            p2: self.p2 + other,
+        }
+    }
+}
+
+impl std::ops::Sub<Vec2> for Box {
+    type Output = Self;
+    fn sub(self, other: Vec2) -> Self {
+        Self {
+            pos: self.pos + other,
+            size: self.size + other
+        }
+    }
+}
+
+pub struct RBox {
+    /// Point 1
+    pub p1: Vec2,
+    /// Point 2
+    pub p2: Vec2, 
+    /// Width
+    pub w: f32,
+}
+
+impl std::ops::Add<Vec2> for RBox {
+    type Output = Self;
+    fn add(self, other: Vec2) -> Self {
+        Self {
+            p1: self.p1 + other,
+            p2: self.p2 + other,
+            w: self.w,
+        }
+    }
+}
+
+impl std::ops::Sub<Vec2> for RBox {
+    type Output = Self;
+    fn sub(self, other: Vec2) -> Self {
+        Self {
+            p1: self.p1 + other,
+            p2: self.p2 + other,
+            w: self.w,
+        }
+    }
+}